/* ─────────────────────────────────────────────────────────
   ZKTest · v2 (modern rebuild)
   ───────────────────────────────────────────────────────── */

/* ── Tokens ─────────────────────────────────────────────── */
:root {
    --bg:           #f4f5fb;
    --bg-grad:      radial-gradient(1100px 600px at 8% -10%, rgba(99,102,241,.18), transparent 60%),
                    radial-gradient(900px 500px at 100% 0%, rgba(236,72,153,.14), transparent 55%),
                    linear-gradient(180deg, #f4f5fb 0%, #eef0f9 100%);
    --surface:      #ffffff;
    --surface-2:    #f7f8fc;
    --surface-3:    #eef0f8;
    --border:       #e3e6f1;
    --border-2:     #d3d8e8;
    --text:         #11142a;
    --text-2:       #2c3252;
    --muted:        #6b7596;
    --muted-2:      #8a93b3;

    --primary:      #6366f1;
    --primary-2:    #8b5cf6;
    --accent:       #ec4899;
    --grad:         linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --grad-soft:    linear-gradient(135deg, rgba(99,102,241,.12), rgba(236,72,153,.10));

    --success:      #10b981;
    --success-bg:   #d1fae5;
    --success-text: #065f46;
    --danger:       #ef4444;
    --danger-bg:    #fee2e2;
    --danger-text:  #991b1b;
    --warning:      #f59e0b;
    --warning-bg:   #fef3c7;
    --warning-text: #92400e;

    --shadow-sm:    0 1px 2px rgba(17,20,42,.05), 0 1px 3px rgba(17,20,42,.03);
    --shadow:       0 8px 24px -8px rgba(17,20,42,.10), 0 2px 6px rgba(17,20,42,.05);
    --shadow-lg:    0 24px 48px -16px rgba(17,20,42,.18), 0 8px 16px -8px rgba(17,20,42,.08);
    --shadow-glow:  0 12px 32px -8px rgba(99,102,241,.35);

    --radius:       18px;
    --radius-sm:    12px;
    --radius-lg:    24px;

    --topbar-h:     68px;
}

[data-theme="dark"] {
    --bg:           #0a0d18;
    --bg-grad:      radial-gradient(1100px 600px at 8% -10%, rgba(99,102,241,.22), transparent 60%),
                    radial-gradient(900px 500px at 100% 0%, rgba(236,72,153,.16), transparent 55%),
                    linear-gradient(180deg, #0a0d18 0%, #0d1020 100%);
    --surface:      #131729;
    --surface-2:    #181d33;
    --surface-3:    #1e243d;
    --border:       #262c47;
    --border-2:     #323a5a;
    --text:         #f0f2fa;
    --text-2:       #c8cde0;
    --muted:        #8a93b3;
    --muted-2:      #6a7193;

    --shadow-sm:    0 1px 2px rgba(0,0,0,.4);
    --shadow:       0 8px 24px -8px rgba(0,0,0,.55), 0 2px 6px rgba(0,0,0,.3);
    --shadow-lg:    0 24px 48px -16px rgba(0,0,0,.65);
    --shadow-glow:  0 12px 32px -8px rgba(99,102,241,.5);

    --success-bg:   rgba(16,185,129,.18);
    --success-text: #6ee7b7;
    --danger-bg:    rgba(239,68,68,.18);
    --danger-text:  #fca5a5;
    --warning-bg:   rgba(245,158,11,.18);
    --warning-text: #fcd34d;
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html, body { height: 100%; }
body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    font-size: 15px;
    line-height: 1.55;
    color: var(--text);
    background: var(--bg);
    background-image: var(--bg-grad);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
.hidden { display: none !important; }

/* ── Topbar ─────────────────────────────────────────────── */
.topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--topbar-h);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    background: color-mix(in srgb, var(--surface) 78%, transparent);
    border-bottom: 1px solid var(--border);
}

.topbar__inner {
    max-width: 1280px;
    margin: 0 auto;
    height: 100%;
    padding: 0 28px;
    display: flex;
    align-items: center;
    gap: 28px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-weight: 700;
    font-size: 1.08rem;
    letter-spacing: -.01em;
    color: var(--text);
}

.brand__mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--grad);
    color: #fff;
    font-size: .82rem;
    font-weight: 800;
    letter-spacing: -.02em;
    box-shadow: var(--shadow-glow);
}

.topnav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 12px;
}

.topnav__link {
    padding: 8px 14px;
    border-radius: 10px;
    font-size: .92rem;
    font-weight: 500;
    color: var(--muted);
    transition: color .15s ease, background .15s ease;
}

.topnav__link:hover { color: var(--text); background: var(--surface-2); }
.topnav__link.is-active {
    color: var(--text);
    background: var(--surface-2);
    font-weight: 600;
}

.topbar__actions {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
}

.icon-btn {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: var(--text-2);
    transition: background .15s ease, color .15s ease;
}

.icon-btn:hover { background: var(--surface-2); color: var(--text); }

.icon-btn .icon-moon { display: none; }
[data-theme="dark"] .icon-btn .icon-sun { display: none; }
[data-theme="dark"] .icon-btn .icon-moon { display: block; }

.icon-btn--menu { display: none; }

/* ── Page shell ─────────────────────────────────────────── */
.page {
    max-width: 1280px;
    margin: 0 auto;
    padding: 36px 28px 96px;
}

.view { display: none; animation: fadeIn .25s ease; }
.view--active { display: block; }
.view--full { display: none; }
.view--full.view--active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.kicker {
    display: inline-block;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--primary);
    background: var(--grad-soft);
    padding: 5px 11px;
    border-radius: 999px;
    margin-bottom: 14px;
}

.muted { color: var(--muted); }
.grad-text {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* ── Hero ───────────────────────────────────────────────── */
.hero {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 36px;
    margin-bottom: 36px;
    padding: 36px 0 12px;
}

.hero__title {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-size: clamp(2rem, 4.6vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -.025em;
    line-height: 1.08;
}

.hero__lead {
    margin-top: 18px;
    color: var(--muted);
    font-size: 1.05rem;
    max-width: 560px;
}

.hero__cta {
    margin-top: 26px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.hero__stats {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
    align-content: center;
}

.stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 18px 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat__num {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}

.stat__label {
    display: block;
    margin-top: 6px;
    color: var(--muted);
    font-size: .82rem;
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 12px;
    font-size: .94rem;
    font-weight: 600;
    line-height: 1;
    transition: transform .12s ease, box-shadow .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
    border: 1px solid transparent;
    white-space: nowrap;
}

.btn--sm { padding: 8px 12px; font-size: .85rem; border-radius: 9px; }

.btn--primary {
    color: #fff;
    background: var(--grad);
    box-shadow: var(--shadow-glow);
}
.btn--primary:hover { transform: translateY(-1px); box-shadow: 0 14px 36px -8px rgba(99,102,241,.5); }
.btn--primary:active { transform: translateY(0); }

.btn--secondary {
    background: var(--surface);
    border-color: var(--border);
    color: var(--text);
}
.btn--secondary:hover { background: var(--surface-2); border-color: var(--border-2); }

.btn--ghost {
    background: transparent;
    color: var(--text-2);
}
.btn--ghost:hover { background: var(--surface-2); color: var(--text); }

.btn--rate {
    flex: 1;
    padding: 14px 22px;
    font-size: 1rem;
    border-radius: 14px;
}
.btn--rate-yes { background: var(--success); color: #fff; }
.btn--rate-yes:hover { background: #059669; transform: translateY(-1px); box-shadow: 0 12px 24px -8px rgba(16,185,129,.5); }
.btn--rate-no { background: var(--surface); border-color: var(--border-2); color: var(--text); }
.btn--rate-no:hover { background: var(--danger-bg); color: var(--danger-text); border-color: var(--danger); }

/* ── Home grid ──────────────────────────────────────────── */
.home-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 12px;
}

.feature-card {
    position: relative;
    text-align: left;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    box-shadow: var(--shadow-sm);
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--grad-soft);
    opacity: 0;
    transition: opacity .18s ease;
    pointer-events: none;
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-2);
}
.feature-card:hover::before { opacity: 1; }

.feature-card--accent {
    background: var(--grad);
    border-color: transparent;
    color: #fff;
}
.feature-card--accent::before { display: none; }
.feature-card--accent .feature-card__icon { background: rgba(255,255,255,.2); color: #fff; }
.feature-card--accent p { color: rgba(255,255,255,.9); }

.feature-card__icon {
    position: relative;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--grad-soft);
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.feature-card__icon svg { width: 22px; height: 22px; }

.feature-card h3 {
    position: relative;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.18rem;
    font-weight: 700;
    margin-bottom: 6px;
}
.feature-card p {
    position: relative;
    color: var(--muted);
    font-size: .92rem;
}

.feature-card__arrow {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 1.2rem;
    color: var(--muted);
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity .18s, transform .18s;
}
.feature-card:hover .feature-card__arrow { opacity: 1; transform: translateX(0); }
.feature-card--accent .feature-card__arrow { color: #fff; }

/* ── View header ────────────────────────────────────────── */
.view__header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 18px;
    margin: 8px 0 30px;
}

.view__title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 700;
    letter-spacing: -.02em;
}

.view__sub {
    margin-top: 6px;
    color: var(--muted);
    font-size: .98rem;
    max-width: 620px;
}

.search-wrap {
    position: relative;
    min-width: 260px;
}
.search-wrap svg {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--muted);
}
.search-input {
    width: 100%;
    padding: 11px 14px 11px 40px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface);
    font-size: .92rem;
    transition: border-color .15s, box-shadow .15s;
}
.search-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(99,102,241,.15); }

/* ── Test groups & tiles ────────────────────────────────── */
.test-groups { display: flex; flex-direction: column; gap: 32px; }

.test-group__title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: .82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--muted-2);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.tile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
}

.tile {
    text-align: left;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: transform .15s ease, box-shadow .15s ease, border-color .15s, background .15s;
}
.tile:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--primary);
}
.tile__icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--grad-soft);
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tile__icon svg { width: 20px; height: 20px; }
.tile__body { min-width: 0; flex: 1; }
.tile__title {
    font-size: .98rem;
    font-weight: 600;
    color: var(--text);
    line-height: 1.25;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.tile__meta { color: var(--muted); font-size: .8rem; margin-top: 2px; }
.tile__arrow { color: var(--muted-2); font-size: 1.1rem; transition: transform .15s, color .15s; }
.tile:hover .tile__arrow { transform: translateX(3px); color: var(--primary); }
/* ── Locked tile (protected tests) ─────────────────────── */
.tile__name { font-size: .98rem; font-weight: 600; color: var(--text); line-height: 1.25; }
.tile--locked { opacity: .85; }
.tile--locked .tile__icon { background: rgba(var(--primary-rgb, 99,102,241),.1); color: var(--primary); }
.tile--locked:hover { border-color: var(--primary); opacity: 1; }


/* ── Materials grid ─────────────────────────────────────── */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.material {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: transform .15s, box-shadow .15s, border-color .15s;
}

.material:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--border-2);
}

.material__icon {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: var(--grad-soft);
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.material__icon svg { width: 24px; height: 24px; }
.material h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
}
.material p { color: var(--muted); font-size: .88rem; }
.material__actions { display: flex; gap: 8px; margin-top: 4px; }
.material__actions .btn { flex: 1; padding: 10px; font-size: .85rem; }

/* ── Links accordion ────────────────────────────────────── */
.links-accordion {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 12px;
    align-items: start;
}

.accordion-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color .15s;
}
.accordion-item.is-open { border-color: var(--primary); box-shadow: var(--shadow-sm); }

.accordion-header {
    width: 100%;
    padding: 14px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    text-align: left;
    transition: background .15s;
}
.accordion-header:hover { background: var(--surface-2); }
.accordion-header__title {
    font-weight: 600;
    color: var(--text);
}
.accordion-header__count {
    font-size: .76rem;
    background: var(--grad-soft);
    color: var(--primary);
    padding: 3px 9px;
    border-radius: 999px;
    font-weight: 600;
    margin-left: 8px;
}
.accordion-chevron {
    color: var(--muted);
    transition: transform .2s;
}
.accordion-item.is-open .accordion-chevron { transform: rotate(180deg); }

.accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height .25s ease;
}
.accordion-item.is-open .accordion-body { max-height: 800px; }
.accordion-body-inner {
    padding: 4px 8px 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    border-top: 1px solid var(--border);
}

.link-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 10px;
    text-align: left;
    color: var(--text-2);
    transition: background .12s, color .12s;
}
.link-item:hover { background: var(--surface-2); color: var(--text); }
.link-item__icon { color: var(--muted-2); display: inline-flex; flex-shrink: 0; }
.link-item__label { flex: 1; font-size: .9rem; }
.link-item__arrow { color: var(--muted-2); }

/* ── Runner (quiz/flashcards) ───────────────────────────── */
.runner-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 18px;
}
.runner-bar__title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.06rem;
    font-weight: 700;
    color: var(--text);
    text-align: center;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.progress-strip {
    height: 6px;
    background: var(--surface-3);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 12px;
}
.progress-strip__bar {
    height: 100%;
    width: 0;
    background: var(--grad);
    border-radius: 999px;
    transition: width .25s ease;
}

.runner-meta {
    display: flex;
    justify-content: space-between;
    font-size: .85rem;
    color: var(--muted);
    margin-bottom: 18px;
    font-weight: 500;
}

.runner-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    margin-bottom: 18px;
}
.runner-card__question {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.18rem;
    font-weight: 600;
    line-height: 1.45;
    color: var(--text);
    margin-bottom: 22px;
}
.runner-card__options {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.option {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    background: var(--surface-2);
    cursor: pointer;
    transition: border-color .12s, background .12s, transform .08s;
}
.option:hover { border-color: var(--primary); background: var(--surface); }
.option:has(input:checked) { border-color: var(--primary); background: rgba(99,102,241,.06); }
.option input { margin-top: 4px; accent-color: var(--primary); width: 16px; height: 16px; cursor: pointer; }
.option span { flex: 1; color: var(--text-2); }

.option.correct {
    border-color: var(--success);
    background: var(--success-bg);
    color: var(--success-text);
}
.option.correct span { color: var(--success-text); font-weight: 500; }
.option.incorrect {
    border-color: var(--danger);
    background: var(--danger-bg);
    color: var(--danger-text);
}
.option.incorrect span { color: var(--danger-text); }
.option.missed {
    border-color: var(--warning);
    background: var(--warning-bg);
    color: var(--warning-text);
}
.option.missed span { color: var(--warning-text); font-weight: 500; }

.runner-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}
.runner-actions--rate { justify-content: stretch; gap: 12px; }
.runner-actions .btn { min-width: 130px; }

.hint-text {
    text-align: center;
    color: var(--muted);
    font-size: .82rem;
    margin-top: 10px;
}

/* ── Flashcard ──────────────────────────────────────────── */
.flashcard {
    perspective: 1400px;
    margin: 0 auto 18px;
    width: 100%;
    max-width: 720px;
    height: 360px;
    cursor: pointer;
    outline: none;
}
.flashcard:focus-visible .flashcard__inner { box-shadow: 0 0 0 3px rgba(99,102,241,.4); border-radius: var(--radius); }

.flashcard__inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform .55s cubic-bezier(.55,.01,.4,1);
    transform-style: preserve-3d;
}
.flashcard.is-flipped .flashcard__inner { transform: rotateY(180deg); }

.flashcard__face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-shadow: var(--shadow-lg);
    overflow: auto;
}

.flashcard__face--back {
    transform: rotateY(180deg);
    background: linear-gradient(135deg, var(--surface) 0%, var(--surface-2) 100%);
    border-color: var(--primary);
}

.flashcard__hint {
    position: absolute;
    top: 18px;
    left: 50%;
    transform: translateX(-50%);
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--muted-2);
}

.flashcard__text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    font-weight: 500;
    line-height: 1.5;
    color: var(--text);
    max-width: 90%;
}

.flashcard__text strong, .flashcard__text b {
    color: var(--primary);
    font-weight: 700;
}

.fc-options-list {
    text-align: left;
    margin-top: 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
}
.fc-options-list .fc-opt {
    padding: 8px 12px;
    border-radius: 8px;
    background: var(--surface-2);
    font-size: .92rem;
    color: var(--text-2);
    border: 1px solid var(--border);
}
.fc-options-list .fc-opt--correct {
    background: var(--success-bg);
    color: var(--success-text);
    border-color: var(--success);
    font-weight: 500;
}

/* ── Trainer ───────────────────────────────────────────── */
.trainer-tabs {
    display: inline-flex;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 22px;
    gap: 4px;
}
.trainer-tab {
    padding: 8px 18px;
    border-radius: 9px;
    font-size: .9rem;
    font-weight: 500;
    color: var(--muted);
    transition: background .15s, color .15s;
}
.trainer-tab:hover { color: var(--text); }
.trainer-tab.is-active { background: var(--surface); color: var(--text); font-weight: 600; box-shadow: var(--shadow-sm); }

.trainer-pane { animation: fadeIn .2s ease; }

.trainer-empty {
    text-align: center;
    background: var(--surface);
    border: 1px dashed var(--border-2);
    border-radius: var(--radius);
    padding: 56px 24px;
}
.trainer-empty h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.18rem;
    margin-bottom: 6px;
}
.trainer-empty p { color: var(--muted); margin-bottom: 18px; }

.trainer-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 22px;
}
.trainer-form__row { margin-bottom: 14px; }
.trainer-form label {
    display: flex;
    flex-direction: column;
    font-size: .82rem;
    font-weight: 600;
    color: var(--text-2);
    gap: 6px;
}
.trainer-form input, .trainer-form textarea {
    padding: 12px 14px;
    border: 1px solid var(--border);
    background: var(--surface-2);
    border-radius: 10px;
    font-size: .94rem;
    color: var(--text);
    font-weight: 400;
    transition: border-color .15s, box-shadow .15s;
    resize: vertical;
}
.trainer-form input:focus, .trainer-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99,102,241,.12);
}

.trainer-form__actions { display: flex; gap: 8px; }

.trainer-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.trainer-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 18px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    transition: border-color .15s, box-shadow .15s;
}
.trainer-item:hover { border-color: var(--border-2); box-shadow: var(--shadow-sm); }
.trainer-item__num {
    width: 28px;
    height: 28px;
    background: var(--grad-soft);
    color: var(--primary);
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .82rem;
    flex-shrink: 0;
}
.trainer-item__body { flex: 1; min-width: 0; }
.trainer-item__q { font-weight: 600; color: var(--text); margin-bottom: 4px; }
.trainer-item__a { color: var(--muted); font-size: .9rem; line-height: 1.5; }
.trainer-item__actions { display: flex; gap: 4px; }
.trainer-item__btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    color: var(--muted);
    transition: background .12s, color .12s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.trainer-item__btn:hover { background: var(--surface-2); color: var(--text); }
.trainer-item__btn.is-danger:hover { background: var(--danger-bg); color: var(--danger-text); }

/* ── End screen ─────────────────────────────────────────── */
.end-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    max-width: 920px;
    margin: 0 auto;
}
.end-card__head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}
.end-card__head h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
}
.end-score {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.4rem;
    font-weight: 700;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
}
.end-score__sep { margin: 0 4px; opacity: .6; }
.end-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 28px; }

.end-results { display: flex; flex-direction: column; gap: 8px; }
.result-item {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-left: 3px solid var(--success);
    border-radius: 10px;
    padding: 12px 16px;
}
.result-item--fail { border-left-color: var(--danger); }
.result-item__header {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: .92rem;
}
.result-item__badge {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--success);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .8rem;
    flex-shrink: 0;
    margin-top: 2px;
}
.result-item--fail .result-item__badge { background: var(--danger); }
.result-item__num { font-weight: 600; color: var(--text); flex-shrink: 0; }
.result-item__question { color: var(--text-2); }
.result-item__options { margin-top: 10px; padding-left: 32px; display: flex; flex-direction: column; gap: 4px; }
.result-opt {
    padding: 6px 10px;
    border-radius: 8px;
    background: var(--surface);
    font-size: .85rem;
    color: var(--muted);
    border: 1px solid var(--border);
}
.result-opt--correct { background: var(--success-bg); color: var(--success-text); border-color: var(--success); font-weight: 500; }
.result-opt--wrong { background: var(--danger-bg); color: var(--danger-text); border-color: var(--danger); }

/* ── Continue prompt ────────────────────────────────────── */
.continue-card {
    max-width: 520px;
    margin: 60px auto 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow);
}
.continue-card__icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: var(--grad-soft);
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}
.continue-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.3rem;
    margin-bottom: 6px;
}
.continue-card__actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 20px; }

/* ── Modal ──────────────────────────────────────────────── */
.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
}
.modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(8,10,22,.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    animation: fadeIn .2s ease;
}
.modal__window {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 520px;
    width: 100%;
    padding: 30px;
    animation: popIn .25s cubic-bezier(.4,1.6,.6,1);
}
@keyframes popIn {
    from { opacity: 0; transform: scale(.96) translateY(8px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal__window--picker { padding: 32px; }
.modal__window h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.45rem;
    font-weight: 700;
    margin-bottom: 6px;
}
.modal__window > p.muted { margin-bottom: 22px; font-size: .94rem; }

.modal__close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 32px;
    height: 32px;
    border-radius: 9px;
    color: var(--muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background .12s, color .12s;
}
.modal__close:hover { background: var(--surface-2); color: var(--text); }

.modal__window--pdf {
    max-width: 1100px;
    width: 100%;
    height: 90vh;
    padding: 0;
    display: flex;
    flex-direction: column;
}
.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    gap: 12px;
}
.modal__title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}
.modal__header-actions { display: flex; align-items: center; gap: 8px; }

.modal__frame {
    flex: 1;
    width: 100%;
    border: none;
    background: var(--surface-2);
}

.modal__fallback {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 28px;
    color: var(--muted);
}

/* ── Mode picker options ────────────────────────────────── */
.mode-options { display: flex; flex-direction: column; gap: 10px; }
.mode-option {
    text-align: left;
    background: var(--surface-2);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: border-color .15s, transform .12s, background .15s;
}
.mode-option:hover {
    border-color: var(--primary);
    background: var(--surface);
    transform: translateY(-1px);
}
.mode-option__icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: #fff;
}
.mode-option__icon svg { width: 22px; height: 22px; }
.mode-option__icon--blue { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.mode-option__icon--pink { background: linear-gradient(135deg, #ec4899, #db2777); }
.mode-option__icon--purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.mode-option__body { flex: 1; min-width: 0; }
.mode-option__body h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 3px;
}
.mode-option__body p { font-size: .87rem; color: var(--muted); }
.mode-option__arrow {
    font-size: 1.3rem;
    color: var(--muted-2);
    transition: transform .15s, color .15s;
}
.mode-option:hover .mode-option__arrow { transform: translateX(4px); color: var(--primary); }

/* ── Toast ──────────────────────────────────────────────── */
.toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    z-index: 300;
    background: var(--text);
    color: var(--surface);
    padding: 12px 20px;
    border-radius: 12px;
    font-size: .92rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: opacity .25s, transform .25s;
    pointer-events: none;
}
.toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ── Status & error ─────────────────────────────────────── */
.status-message {
    color: var(--primary);
    font-size: .9rem;
    font-weight: 500;
    min-height: 22px;
}
.error-message {
    background: var(--danger-bg);
    color: var(--danger-text);
    border: 1px solid var(--danger);
    border-radius: 10px;
    padding: 12px 14px;
    margin-bottom: 18px;
    font-size: .9rem;
}

/* ── Action bar (chips) ─────────────────────────────────── */
.action-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
    margin-bottom: 28px;
}
.action-chip {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    text-align: left;
    transition: transform .15s, border-color .15s, box-shadow .15s;
    box-shadow: var(--shadow-sm);
    position: relative;
}
.action-chip:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}
.action-chip__icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--grad-soft);
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.action-chip__body { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.action-chip__title { font-weight: 600; color: var(--text); font-size: .95rem; }
.action-chip__sub { font-size: .8rem; color: var(--muted); }
.action-chip__badge {
    background: var(--accent);
    color: #fff;
    font-size: .7rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 999px;
    min-width: 22px;
    text-align: center;
}
.action-chip__badge[data-empty="true"] {
    background: var(--surface-3);
    color: var(--muted);
}

/* ── Info card (mode setup screens) ─────────────────────── */
.info-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    max-width: 760px;
    margin: 0 auto 28px;
    text-align: left;
}
.info-card__title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.info-card__text { color: var(--muted); font-size: .98rem; margin-bottom: 18px; }
.info-card__actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ── Resume banner ──────────────────────────────────────── */
.resume-banner {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--grad-soft);
    border: 1px solid var(--primary);
    border-radius: 14px;
    margin: 0 auto 18px;
    max-width: 760px;
    flex-wrap: wrap;
}
.resume-banner__icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--grad);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.resume-banner__body { flex: 1; min-width: 200px; }
.resume-banner__body h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.02rem;
    font-weight: 700;
    margin-bottom: 2px;
    color: var(--text);
}
.resume-banner__body p { color: var(--muted); font-size: .88rem; }
.resume-banner__actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ── Mock exam category breakdown ───────────────────────── */
.cat-breakdown {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    margin: 20px 0;
}
.cat-breakdown__row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    font-size: .94rem;
}
.cat-breakdown__row:last-child { border-bottom: none; }
.cat-breakdown__label { font-weight: 500; color: var(--text); }
.cat-breakdown__count {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    color: var(--primary);
}
.cat-breakdown__total {
    margin-top: 8px;
    padding-top: 12px;
    border-top: 2px solid var(--border-2);
    font-weight: 700;
    color: var(--text);
}
.cat-breakdown__warn {
    color: var(--warning-text);
    font-size: .82rem;
    background: var(--warning-bg);
    padding: 8px 12px;
    border-radius: 8px;
    margin-top: 12px;
}

.cat-badge {
    background: var(--grad-soft);
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 999px;
    font-size: .78rem;
    font-weight: 600;
}

/* ── Timer pill ─────────────────────────────────────────── */
.timer-pill {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 6px 14px;
    border-radius: 999px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: .92rem;
    letter-spacing: .04em;
}
.timer-pill--warn { border-color: var(--warning); color: var(--warning-text); background: var(--warning-bg); }
.timer-pill--danger { border-color: var(--danger); color: var(--danger-text); background: var(--danger-bg); animation: pulse 1.2s ease infinite; }
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: .6; }
}

/* ── Mock exam result categories ────────────────────────── */
.cat-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 10px;
    margin-bottom: 24px;
}
.cat-result {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px;
}
.cat-result__label {
    font-size: .82rem;
    color: var(--muted);
    margin-bottom: 6px;
    font-weight: 500;
}
.cat-result__score {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text);
}
.cat-result__score-sep { color: var(--muted); margin: 0 2px; }
.cat-result__bar {
    height: 6px;
    background: var(--surface-3);
    border-radius: 999px;
    margin-top: 8px;
    overflow: hidden;
}
.cat-result__bar-fill {
    height: 100%;
    border-radius: 999px;
}

/* ── Heatmap ────────────────────────────────────────────── */
.heatmap-legend {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    font-size: .82rem;
}
.legend-bar {
    flex: 1;
    max-width: 240px;
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(90deg, #ef4444 0%, #f59e0b 50%, #10b981 100%);
}

.section-subtitle {
    font-family: 'Space Grotesk', sans-serif;
    font-size: .82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--muted-2);
    margin: 28px 0 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.heatmap-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
    margin-bottom: 8px;
}
.heatmap-cat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px;
    box-shadow: var(--shadow-sm);
}
.heatmap-cat__head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 8px;
}
.heatmap-cat__title { font-weight: 600; color: var(--text); font-size: .96rem; }
.heatmap-cat__pct {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.05rem;
}
.heatmap-cat__bar {
    height: 8px;
    background: var(--surface-3);
    border-radius: 999px;
    overflow: hidden;
}
.heatmap-cat__bar-fill {
    height: 100%;
    border-radius: 999px;
    transition: width .35s ease;
}
.heatmap-cat__meta { font-size: .78rem; color: var(--muted); margin-top: 6px; }

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 8px;
}
.heatmap-cell {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px;
    transition: transform .12s, box-shadow .12s;
    position: relative;
    overflow: hidden;
}
.heatmap-cell::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: var(--cell-opacity, 0);
    background: var(--cell-color, var(--surface-3));
    pointer-events: none;
}
.heatmap-cell:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.heatmap-cell__title {
    position: relative;
    font-weight: 600;
    font-size: .88rem;
    color: var(--text);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.heatmap-cell__pct {
    position: relative;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text);
}
.heatmap-cell__meta { position: relative; font-size: .72rem; color: var(--muted); margin-top: 2px; }

/* ── Error mode list ────────────────────────────────────── */
.error-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 760px;
    margin: 0 auto;
}
.error-list-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 3px solid var(--danger);
    border-radius: 10px;
    padding: 14px 16px;
    font-size: .92rem;
    color: var(--text-2);
}
.error-list-item__src { font-size: .76rem; color: var(--muted); margin-bottom: 4px; }
.error-list-empty {
    text-align: center;
    color: var(--muted);
    padding: 40px 20px;
    background: var(--surface);
    border: 1px dashed var(--border-2);
    border-radius: var(--radius);
}

/* ── Oral simulator ─────────────────────────────────────── */
.oral-controls {
    display: flex;
    gap: 14px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px 18px;
}
.oral-control {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: .82rem;
    color: var(--text-2);
    font-weight: 500;
}
.oral-control select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: var(--surface-2);
    color: var(--text);
    font-size: .9rem;
}
.oral-control select:focus { outline: none; border-color: var(--primary); }

.oral-stage {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 32px;
    box-shadow: var(--shadow);
    text-align: center;
    min-height: 380px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
}
.oral-topic {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
    max-width: 720px;
}
.oral-source {
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .1em;
}
.oral-timer-wrap {
    position: relative;
    width: 120px;
    height: 120px;
}
.oral-ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}
.oral-ring__bg {
    fill: none;
    stroke: var(--surface-3);
    stroke-width: 8;
}
.oral-ring__fg {
    fill: none;
    stroke: url(#oralGrad);
    stroke: var(--primary);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 339.292;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear, stroke .25s;
}
.oral-ring__fg.is-warn { stroke: var(--warning); }
.oral-ring__fg.is-danger { stroke: var(--danger); }
.oral-timer-text {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 2rem;
    color: var(--text);
}
.oral-answer {
    background: var(--grad-soft);
    border: 1px solid var(--primary);
    border-radius: 14px;
    padding: 18px 22px;
    color: var(--text);
    line-height: 1.55;
    font-size: 1rem;
    max-width: 720px;
    text-align: left;
    width: 100%;
}
.oral-actions { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.oral-rate { display: flex; gap: 12px; width: 100%; max-width: 480px; }
.oral-rate .btn { flex: 1; }

/* ── Dialog mode ────────────────────────────────────────── */
.dialog-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 14px;
}
.dialog-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px;
    text-align: left;
    box-shadow: var(--shadow-sm);
    transition: transform .15s, box-shadow .15s, border-color .15s;
}
.dialog-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}
.dialog-card__icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--grad);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
}
.dialog-card__title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text);
}
.dialog-card__intro { color: var(--muted); font-size: .88rem; line-height: 1.5; margin-bottom: 10px; }
.dialog-card__meta { color: var(--muted-2); font-size: .76rem; }
.dialog-card__progress {
    display: inline-block;
    margin-top: 8px;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 600;
    background: var(--warning-bg);
    color: var(--warning-text);
    border: 1px solid var(--warning);
}
.dialog-card__progress--done {
    background: var(--success-bg);
    color: var(--success-text);
    border-color: var(--success);
}

.dialog-stream {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
    max-height: 320px;
    overflow-y: auto;
    padding-right: 4px;
}
.dialog-bubble {
    padding: 14px 18px;
    border-radius: 14px;
    max-width: 90%;
}
.dialog-bubble__role {
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    display: block;
    margin-bottom: 4px;
    opacity: .7;
}
.dialog-bubble__text { line-height: 1.55; font-size: .95rem; }
.dialog-bubble--examiner {
    background: var(--surface-2);
    border: 1px solid var(--border);
    align-self: flex-start;
    color: var(--text);
}
.dialog-bubble--you {
    background: var(--grad);
    color: #fff;
    align-self: flex-end;
    margin-left: auto;
}
.dialog-bubble--past { opacity: .68; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 980px) {
    .hero { grid-template-columns: 1fr; }
    .home-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
    .topbar__inner { padding: 0 18px; gap: 12px; }
    .topnav { display: none; }
    .topnav.is-mobile-open {
        display: flex;
        position: absolute;
        top: var(--topbar-h);
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        padding: 8px;
        gap: 4px;
    }
    .topnav.is-mobile-open .topnav__link { width: 100%; text-align: left; }
    .icon-btn--menu { display: inline-flex; }

    .page { padding: 24px 18px 80px; }
    .hero { gap: 22px; padding: 18px 0 0; }
    .hero__stats { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
    .stat { padding: 14px 8px; }
    .stat__num { font-size: 1.4rem; }
    .home-grid { grid-template-columns: 1fr; }

    .runner-card { padding: 20px; }
    .runner-card__question { font-size: 1.05rem; }
    .runner-bar__title { font-size: .95rem; }
    .flashcard { height: 320px; }
    .flashcard__face { padding: 24px 20px; }
    .flashcard__text { font-size: 1.05rem; }

    .runner-actions { flex-direction: column; }
    .runner-actions .btn { width: 100%; }
    .runner-actions--rate { flex-direction: row; }

    .end-card { padding: 22px; }

    .modal { padding: 16px; }
    .modal__window { padding: 24px; }
    .modal__window--picker { padding: 26px 22px; }
    .modal__window--pdf { height: 92vh; }

    .search-wrap { width: 100%; min-width: 0; }
}